Highly Luminescent Colloidal Nanoplates of Perovskite Cesium Lead Halide and Their Oriented Assemblies

Yehonadav Bekenstein, Brent A Koscher, Samuel W Eaton, Peidong Yang, A Paul Alivisatos

Research output: Contribution to journalArticlepeer-review

Abstract

Anisotropic colloidal quasi-two-dimensional nanoplates (NPLs) hold great promise as functional materials due to their combination of low dimensional optoelectronic properties and versatility through colloidal synthesis. Recently, lead-halide perovskites have emerged as important optoelectronic materials with excellent efficiencies in photovoltaic and light-emitting applications. Here we report the synthesis of quantum confined all inorganic cesium lead halide nanoplates in the perovskite crystal structure that are also highly luminescent (PLQY 84%). The controllable self-assembly of nanoplates either into stacked columnar phases or crystallographic-oriented thin-sheet structures is demonstrated. The broad accessible emission range, high native quantum yields, and ease of self-assembly make perovskite NPLs an ideal platform for fundamental optoelectronic studies and the investigation of future devices.

Original languageEnglish
Pages (from-to)16008-11
Number of pages4
JournalJournal of the American Chemical Society
Volume137
Issue number51
DOIs
StatePublished - 30 Dec 2015

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